Electrical Connections; Starting; Adjustment - Wilo TWU 3 PnP Einbau- Und Betriebsanleitung

ENGLISH
5.3

Electrical connections

The electrical connection and checking work must be done by a licenced
electrician and in accordance with the local standards in force.
Check the line power voltage.
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Use a cable meeting electrical standards and connect as shown by the diagram
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inside the switch box or the control unit.

Starting

6
ATTENTION! The pressure measured at the borehole outlet with closed valve
6.1 Operation
ATTENTION! Never let the pump run dry, however briefly.
Never operate for more than two minutes with the discharge valve fully closed.
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Once again check all the electric connections, electric protection, rating of the
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fuse(s).
Measure the current and compare with the nominal values mentioned on the name
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plate.
Do not exceed the nominal current of the motor.
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Measure the power supply voltage with motor running.
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Allowed tolerance : ±10% of U
Remove air from the delivery tube to avoid any hammerblow effects when starting:
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Therefor open one tap during the pump starting.
6.2

Adjustment

6.2.1 PnP(1 /FC) version
The FLUID CONTROL threshold is adjusted at 1.5 bar in factory.
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Adjustment of the starting pressure of the pump
If the water column Delivery Pressure is higher than 15 m, the pump can not start again
with the starting pressure (1.5 bar) preset in the factory.
It is also required to change this adjustment with the screw (pos. 7, see figure 4):
Pump is stopped, tap is opened,
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Read the pressure due to the water column on the pressure gauge and turn the
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screw in the sense + up to pump starting.
Make a precise adjustment during other ON-OFF cycles: read the starting pressure
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on the pressure gauge and move the screw in the required sense + or
32
18 ( )
corresponds to the head of the pump at zero output minus the height
between ground level and water level.
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